If you are trying to enter numbers into editable text boxes in a block dialog and nothing appears, the problem could be that your system has been set to use right-to-left text for programs that do not use Unicode. This setting will work for programs that are built to expect to use right-to-left text, but not for programs that are not set to expect this.

You may need to change your system locale. The system locale determines the default character set (letters, symbols, and numbers) and font that you use to enter information and that are used to display information in programs that do not use Unicode. Selecting a different language for the system locale will not affect the language in menus and dialog boxes for Windows or other programs that do use Unicode. Try changing the default locale to English (United States) and check to see if this helps.

To change the system locale, follow the instructions at: answers.microsoft.com/en-us/windows/forum/windows8_1-desktop/how-to-change-the-system-locale-to-run-non-unicode/7a7c2bd2-b67b-4f89-ad76-04c2346e01c0.